Fix several Stackoverflows (#14783)

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -701,19 +701,7 @@ namespace MediaBrowser.Controller.Entities
         {
             get
             {
-                var customRating = CustomRating;
-                if (!string.IsNullOrEmpty(customRating))
-                {
-                    return customRating;
-                }
-
-                var parent = DisplayParent;
-                if (parent is not null)
-                {
-                    return parent.CustomRatingForComparison;
-                }
-
-                return null;
+                return GetCustomRatingForComparision();
             }
         }
 
@@ -791,6 +779,26 @@ namespace MediaBrowser.Controller.Entities
         /// <value>The remote trailers.</value>
         public IReadOnlyList<MediaUrl> RemoteTrailers { get; set; }
 
+        private string GetCustomRatingForComparision(HashSet<Guid> callstack = null)
+        {
+            callstack ??= new();
+            var customRating = CustomRating;
+            if (!string.IsNullOrEmpty(customRating))
+            {
+                return customRating;
+            }
+
+            callstack.Add(Id);
+
+            var parent = DisplayParent;
+            if (parent is not null && !callstack.Contains(parent.Id))
+            {
+                return parent.GetCustomRatingForComparision(callstack);
+            }
+
+            return null;
+        }
+
         public virtual double GetDefaultPrimaryImageAspectRatio()
         {
             return 0;

MediaBrowser.Controller/Entities/Folder.cs

@@ -568,7 +568,7 @@ namespace MediaBrowser.Controller.Entities
 
                 if (recursive && child is Folder folder)
                 {
-                    await folder.RefreshMetadataRecursive(folder.Children.ToList(), refreshOptions, true, progress, cancellationToken).ConfigureAwait(false);
+                    await folder.RefreshMetadataRecursive(folder.Children.Except([this, child]).ToList(), refreshOptions, true, progress, cancellationToken).ConfigureAwait(false);
                 }
             }
         }

MediaBrowser.Controller/Entities/Video.cs

@@ -152,16 +152,7 @@ namespace MediaBrowser.Controller.Entities
         {
             get
             {
-                if (!string.IsNullOrEmpty(PrimaryVersionId))
-                {
-                    var item = LibraryManager.GetItemById(PrimaryVersionId);
-                    if (item is Video video)
-                    {
-                        return video.MediaSourceCount;
-                    }
-                }
-
-                return LinkedAlternateVersions.Length + LocalAlternateVersions.Length + 1;
+                return GetMediaSourceCount();
             }
         }
 
@@ -259,6 +250,27 @@ namespace MediaBrowser.Controller.Entities
         [JsonIgnore]
         public override MediaType MediaType => MediaType.Video;
 
+        private int GetMediaSourceCount(HashSet<Guid> callstack = null)
+        {
+            callstack ??= new();
+            if (!string.IsNullOrEmpty(PrimaryVersionId))
+            {
+                var item = LibraryManager.GetItemById(PrimaryVersionId);
+                if (item is Video video)
+                {
+                    if (callstack.Contains(video.Id))
+                    {
+                        return video.LinkedAlternateVersions.Length + video.LocalAlternateVersions.Length + 1;
+                    }
+
+                    callstack.Add(video.Id);
+                    return video.GetMediaSourceCount(callstack);
+                }
+            }
+
+            return LinkedAlternateVersions.Length + LocalAlternateVersions.Length + 1;
+        }
+
         public override List<string> GetUserDataKeys()
         {
             var list = base.GetUserDataKeys();